Felt sheet machine



A. FELDMANN FELT SHEET MACHINE Filed March 1, 1939 March 9, 1943.

Patented Mar. 9, 1943 FELT SHEET amounts.

Artur Feldmann, Brunn, Czechoslovakia; vested in the AlienP-roperty Custodian.

Application March 1, 1939, Serial No. 259,169 In Czechoslovakia May- 24, 19 381 3 Claims. (Cl.- 2s.-14). This invention relates to a means for control- I ling machines for the manufacture of felt sheet. The invention relates more particularly to a machine of a known type in which a number of layers of material are fed from a carding machine onto a heated table where the layers are felted together.

The felting process is carried on under the simultaneous eifects of pressure, heat, moisture and shaking movement on the moistened fleece; lying on a steam heated table. The felting is actually elfected by a vertically movable plate which is brought down onto the material and is oscillated by eccentrics in two directions at right angles to each other. been completed, the plate is raised clear of the felted material which is wound off the tableonto a drum or similar device.

Ifhe object of the present invention is to provide an improved means for automatically controlling the operation of such machines.

According to my invention, in a machine of the type set forth above, a motor for effecting one of the operative movements of the machine drives a rotatable member or members having right and left hand screw threads on which nuts are adapted to travel axially as the member rotates and the movement of the nuts cause movement of three-armed levers by which the oscillating plate is moved vertically. One of these levers also controls a switch mechanism for motors by which the various parts of the machine are driven.

In the drawing:

Fig. l is a front elevation of the mechanism.

Fig. 2 is a vertical section of the switch box and its actuating mechanism.

Fig. 3 is a view of the switch-actuating mechanism seen in the direction of the arrow A in Fig. 2.

Figs. 4 respectively, of the time-switch mechanism.

Fig. 6 is a fragmentary View showing the operation of the time switch.

Fig. 7 is a plan of the mechanism for winding up the felt.

In the drawing l is the oscillating plate of the felt sheet machine which is thrown into vibration in two directions perpendicular to one another, two electromotors being therefore provided for the production of such vibrations. In the drawing, one of these oscillating drives is diagrammatically shown, two eccentric devices 2 being indicated which operate the vibration, the respective electromotor not shown. The oscil- When this operation has and are a front elevation and plan,

lating plate is liftedby rods 3. The lifting is effected. by another electromotor (not shown),

whichdrives a shaft onwhichis mountedaworm' 1 meshing with, a. worm wheel. 5. Fixedly connected-to the worm wheels 5 is either a long spindlepartly provided with rightrhanded and lefthandedthreads or two corresponding spindles 6, 1 provided. with opposite threads. Upon these spindles aremountd nuts 3,,9, to which a linear advancing motion is imparted through the revolution of. said. spindles. 'Ilothe said nuts are pivoted. tie rods Ill, i I, which at their other ends are pivoted to three-armlevers l2, [3 supported at L4, and. I5. respectively. 'Owingto the interpolation, .of levers l6, l1, levers l2, [3 act on the lifting rods 3, which raise and lower the plate l. Whenthe Spi dles 6; l. are turned in one direction, weights 18, I9 applied to levers I2, I3 will move dcnrznwardly, To weight I8 is secured arm [9 which carries a roller 20 horizontally movable in a slide way 52 of the connecting device 22 of a switch box 2!. Arm I9 will drive the connecting device 22,,whereby a plurality of switch s 23 are pe ate whic effect he. ontrol, of. h ndiv dua 'e ec romotor f the conneotine de i e. moves, downwardly. switches. .Wil lbe noses areformed as nuts, each one ofv these nuts bein threaded on one, corresponding spindle 21, and adap e tobeadius d inithe upper os o through rotation. of the spindle by means of a squareprojection located at theend of said spindle. .T C ,1. fi Q ex c moment of t e. resp ct v switching b r gu ated b o espond n y adjusting the upper posit ono h a d n ses- M r e a w tch .3.. i pmvi i he witche m device. throu hw ieh switc machin may be hand-operated.

A roller 45 for winding-up the felt (Fig. 1) driven by a special electromotor (not shown), on the shaft of which is mounted a toothed wheel 46 meshing with toothed wheel 41, to which is fastened a nose 48 operating a switch 49.

On shaft 23 (see Figs. 1, 4 and 5) is mounted a small toothed wheel 39 meshing with a toothed wheel 3|, on the shaft of which is mounted a worm 32. This worm 32 engages a worm wheel 33 on the shaft of which is mounted another worm 34. This worm 34 in its turn engages a worm wheel 35 fixedly connected to a ratchet wheel 35 coupled to ratchet wheel 31. On the ratchet wheel 37, that is, the other half of the coupling, is mounted an auxiliary switch which controls the lifting of the oscillating plate. Such auxiliary switch comprises a disk 38, upon which operated by noses 26. Such a clamp or clip 39 may be adjusted through rotation thereof. On the said clip is provided a nose 40 operating a contact H which causes the lifting of the oscillating plate. The ratchet wheel 3? is lifted off by a fork 42 pivoted at 53 (Figs. 5 and 6). Such lifting-off is effected by the upward movement of one of the lifting rods 3, as shown in Fig. 6. On the said lifting rod 3 is mounted a stop 54. The fork 42 is off-set at 43 in an angle of 90, and at the point of off-set, provided with a cam 55 bevelled both at its top spaced horizontally, and means for operating said noses comprising a vertical frame, spaced vertical screws mounted therein, dogs on said screws adapted to be adjusted vertically and positioned to contact said noses upon movement of said frame, and means connecting said frame and one of said levers whereby said frame will be moved simultaneously with said table.

2. In a machine for the manufacture of felt sheets of the type having an oscillating plate,

' means for causing the oscillation of said plate,

and bottom. When rod 3 is lifted, the end 43 of, I

fork 42 is urged in the direction of arrow B,

whereby the ratchet wheel is lifted by the fork.

Thereby a weight M suspended on a chain fastened to disk 3% of the auxiliary switch will return the said switch to its initial position.

The succession of the movements or switchings is as follows: To stop oscillation, the raising movement of the oscillating plate is initiated by a nose 40 which closes switch 4|, whereby the lifting'motor is started. Nose 40 on disc 38 is shifted during the oscillation of plate I by movement of shaft 29 which controls the oscillation. Thereupon the connecting device 22 with spindles 21 and noses 26 is moved downwardly, thereby causing interruption of the oscillation and also interpolation of the windingup, and then stoppage of the lifting movement. Then, replacement of the auxiliary switch formed by the disk 38 is effected by means of rod 3, stop 55 leaving cam 55, so that only the winding-up device remains active, and that, until nose 48 switches in contact 49, which will cause the downward movement of the oscillating plate, stop the winding-up movement, and start the upward movement of the connecting device 22. Owing to this movement, the operation of the oscillating movement is started and the downward movement stopped, the lifting rod 3 for the sake of security again effecting replacement of the time switch.

What I claim is: i

1. In a machine for the manufacture of felt sheets of the type having an oscillating plate, means for causing the lifting of said plate and winding up of felted sheets comprising a lead screw provided with a right hand and left hand thread and rotated by a suitable power means, a nut on each thread of said screw, a lever operated by each nut upon rotation of said lead screw, rods operably connected to each of said levers and to said operating plate whereby movement of said screw causes vertical movement of said. plate, a plurality of switch means operably connected to control the oscillation and winding parts of said machine, each having operating noses means for causing the lifting of said plate and winding up of felted sheets comprising a lead screw provided with right and left hand threaded portions and rotated by a suitable power means, a nut on each thread of said screw, a lever operated by each nut upon rotation of said lead screw, a switch for controlling the movement of said lead screw, rods operably connected to each of said levers and to said operating plate whereby movement of said screw causes vertical movement of said plate, means operable upon predetermined period of oscillation of said plate for operating said switch to initiate vertical movement of said plate, means responsive to said vertical movement to disengage and reset said switch operating means, and switch means operable upon vertical movement of said plate to interrupt the oscillating plate movement, initiate movement of a winding device for felted material, and finally stop said lifting movement.

3. In a machine for the manufacture of felt sheets of the type having an oscillating plate, means for causing the oscillation of said plate, means for causing the lifting of said plate and winding up of felted sheets comprising a lead screw provided with right and left hand threaded portions and rotated by a suitable power means, a nut on each thread of said screw, a lever operated by each nut upon rotation of said lead screw, a switch for controlling the movement of said lead screw, rods operably connected to each of said levers and to said operating plate whereby movement of said screw causes vertical movement of said plate, means operable upon predetermined period of oscillation of said plate for operating said switch to initiate vertical movement of said plate, means responsive to said vertical movement to disengage and reset said switch operating means, switch means operable upon vertical movement of said plate to interrupt the oscillating plate movement, initiate movement of a winding device for felted material, and finally stop said lifting movement, and means on said winding device for causing downward movement of said plate.

ARTUR- FELDMANN 

